Magnetic suspension pavement testing device

Abstract

The utility model discloses a magnetic suspension pavement testing device which comprises a model automobile and a magnetic suspension runway, a vehicle-mounted permanent magnet array is fixedly installed at the bottom of the model vehicle, the magnetic levitation runway comprises a magnetic levitation runway acceleration section and a magnetic levitation runway test section, the magnetic levitation runway acceleration section is connected with the magnetic levitation runway test section, and groove-shaped wheel track belts are arranged on the two sides of the magnetic levitation runway acceleration section and the two sides of the magnetic levitation runway test section correspondingly. Wheels of a model automobile are placed in the groove-shaped wheel track belts, a groove is formed between the groove-shaped wheel track belts on the two sides of the magnetic levitation runway test section, an aluminum plate is laid in the groove, piezoelectric six-dimensional force sensors are embedded in the groove-shaped wheel track belts of the magnetic levitation runway acceleration section and the magnetic levitation runway test section, and the piezoelectric six-dimensional force sensors are embedded in the groove-shaped wheel track belts of the magnetic levitation runway acceleration section and the magnetic levitation runway test section. And the piezoelectric six-dimensional force sensor is connected with the photovoltaic power generation panel and the display instrument. The magnetic suspension pavement test device is easy to build and maintain, and can simultaneously detect magnetic suspension force and magnetic resistance generated by relative movement of an automobile in the driving process.

Description

Technical Field

[0001] This utility model belongs to the field of road engineering technology, and in particular to a magnetic levitation road surface test device. Background Technology

[0002] With the rapid development of the economy and society, transportation, as a crucial infrastructure, plays an increasingly important guiding role in social life. Among them, maglev transportation technology, which does not rely on wheels and rails, is in line with the fast-paced modern lifestyle and is an important application of maglev technology, meeting people's higher speed requirements for cross-regional, long-distance, and high-volume transportation.

[0003] Maglev technology refers to the use of magnetic force to overcome gravity and levitate objects on surfaces without direct contact. Research on maglev technology has been ongoing for over 100 years, with widespread applications in equipment manufacturing, energy, aviation, and aerospace, particularly in transportation. The world's first maglev train structure was proposed by German engineer Kamper in 1922. Subsequently, Germany, Japan, the UK, South Korea, the US, and other countries conducted extensive research on maglev transportation. Maglev trains can be classified into three categories based on their levitation method: the first is electromagnetic levitation trains, which rely on electromagnetic attraction for levitation, such as the German TR high-speed levitation train; the second is electric levitation trains, which rely on the interaction between a source magnetic field and an induced magnetic field for levitation, such as the American Magplane permanent magnet electric levitation train; and the third is high-temperature superconducting maglev trains, which rely on the pinning effect generated by high-temperature superconducting materials in a static external magnetic field for levitation, such as the high-temperature superconducting experimental vehicle researched in China. Besides maglev trains, maglev technology has also been applied in the transportation sector in the form of maglev car concepts, including the Motivity400-C maglev concept car designed by a Japanese company, the Maglev Racer maglev supercar design proposed by the Swedish Gray Design studio, the Eagle 360 ​​spherical tire proposed by the American tire manufacturer Goodyear and applied to the Audi RSQ concept car, and Volkswagen's "yo-yo hover car," etc.

[0004] Currently, indoor tests on maglev transportation technology mainly focus on permanent magnet electric levitation principle test benches, including the double-layer permanent magnet electromagnetic force test device designed by Lawrence Vermore National Laboratory in the United States, a set designed by the Chinese Academy of Sciences to test the effect of the layered form of conductor plate track on the generation of eddy currents in the system, a Halbach permanent magnet electric levitation experimental platform based on a metal turntable track designed by the National University of Defense Technology, and a cylindrical permanent magnet levitation test bench designed by Southwest Jiaotong University that can levitate up to 60 kg.

[0005] The current applications of maglev technology in the transportation sector and related testing platforms demonstrate that maglev technology has matured and become commercialized in rail transit, and the concept of maglev cars is gradually becoming more concrete. However, its application in road transportation is relatively limited. Consequently, most domestic and international maglev test facilities are based on medium-to-high-speed rail lines, lacking road maglev test facilities in the medium-to-low-speed range. Furthermore, many test facilities have significant errors in detecting the magnetic levitation force and magnetic drag generated by the relative motion between the permanent magnet and the track, and cannot simultaneously detect these factors. Summary of the Invention

[0006] The purpose of this invention is to provide a magnetic levitation road surface testing device to solve the problem that existing technologies cannot simultaneously and accurately detect magnetic levitation force and magnetic resistance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A magnetic levitation road test device includes a model car and a magnetic levitation runway;

[0009] The model car has a fixed permanent magnet array mounted on its bottom. The maglev track includes an acceleration section and a test section, which are connected. Both sides of the acceleration and test sections have grooved wheel tracks, and the model car's wheels are placed within these grooved tracks. Grooves are formed between the grooved wheel tracks on both sides of the test section, and aluminum plates are laid in these grooves. Piezoelectric six-dimensional force sensors are embedded in the grooved wheel tracks of both the acceleration and test sections, and these sensors are connected to a photovoltaic panel and a display.

[0010] Furthermore, an epoxy board is fixed to the bottom of the model car by cable ties, and an on-board permanent magnet array is fixed to the epoxy board. The on-board permanent magnet array is installed near the tire.

[0011] Furthermore, the vehicle-mounted permanent magnet array includes several neodymium iron boron permanent magnets with different magnetization directions. Several of the neodymium iron boron permanent magnets are fixed on a low-carbon steel plate, and the low-carbon steel plate is fixed to the surface of an epoxy board with epoxy resin adhesive.

[0012] Furthermore, the bottom of the vehicle-mounted permanent magnet array is parallel to the ground, and the width of the vehicle-mounted permanent magnet array is smaller than the width of the aluminum plate.

[0013] Furthermore, the width of the grooved wheel track in the acceleration section and the test section of the maglev runway is the same, and the width of the grooved wheel track is greater than the tire width of the model car.

[0014] Furthermore, the main body of both the acceleration section and the test section of the maglev runway is made of ABS plastic.

[0015] Furthermore, the piezoelectric six-dimensional force sensor is connected to the display via a transmission cable, which is led out from the side of the grooved wheel track.

[0016] Furthermore, the piezoelectric six-dimensional force sensor in the acceleration section of the maglev runway is buried close to the test section of the maglev runway.

[0017] Furthermore, the aluminum plate is elongated, and its upper surface is flush with the surface of the grooved wheel track.

[0018] Furthermore, the piezoelectric six-dimensional force sensor is connected to the photovoltaic power generation panel via wires, which are led out from the side of the grooved wheel track, and the photovoltaic power generation panel is installed on both sides of the maglev runway.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention provides a magnetic levitation road surface testing device. An onboard permanent magnet array is fixedly installed on the bottom of a model car. An interconnected acceleration section and test section of the magnetic levitation runway are set up. Grooved wheel track strips are provided on both sides of the magnetic levitation runway. The model car's wheels are placed within these grooved wheel track strips, ensuring the model car is already loaded to the required test speed before entering the test section. An aluminum plate is laid between the grooved wheel track strips on both sides of the test section. Through the interaction between the onboard permanent magnet array and the aluminum plate within the magnetic levitation runway, the model car achieves magnetic levitation. The device can simultaneously detect the magnetic levitation force and magnetic resistance generated by the relative motion between the onboard permanent magnet array and the magnetic levitation runway during the model car's movement, which is beneficial for evaluating and optimizing the performance of the magnetic levitation system. Meanwhile, by embedding a piezoelectric six-dimensional force sensor within the grooved wheel track, and connecting the piezoelectric six-dimensional force sensor to a photovoltaic power generation panel and a display, the photovoltaic power generation panel powers the piezoelectric six-dimensional force sensor. This allows for real-time and accurate acquisition of various mechanical data of the model car during its driving process, facilitating data analysis and processing and contributing to the determination of the dynamic performance of the maglev vehicle. This novel maglev road surface testing device is low-cost, easy to build and maintain, and improves testing efficiency and accuracy. It enables the application of linear Halbach permanent magnet arrays, vehicles, and road surfaces in the field of road traffic, providing more advanced technical support for future maglev transportation systems. This testing device can be promoted for application in real-world road scenarios. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the magnetic levitation road surface test device of this utility model.

[0023] Figure 2 This is a top view of the maglev runway of this utility model.

[0024] Figure 3 This is a cross-sectional view of the test device of this utility model.

[0025] Figure 4 This is a schematic diagram of the connection between the acceleration section and the test section of this utility model.

[0026] Figure 5 This is a schematic diagram of the vehicle-mounted permanent magnet array of this utility model.

[0027] Among them: 1-maglev runway acceleration section, 2-maglev runway test section, 3-grooved wheel track, 4-piezoelectric six-dimensional force sensor, 5-transmission cable, 6-display instrument, 7-aluminum plate, 8-vehicle permanent magnet array, 9-epoxy board, 10-model car, 11-neodymium iron boron permanent magnet, 12-low carbon steel plate, 13-photovoltaic power generation panel. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings:

[0035] See Figure 1 This utility model provides a magnetic levitation road test device, including a model car 10, a photovoltaic power generation panel 13 and a magnetic levitation runway.

[0036] The model car 10 is equipped with an onboard permanent magnet array 8 and an epoxy board 9. The epoxy board 9 is machined into a suitable shape, and holes are drilled at its four corners. It is then fixed to the bottom of the model car 10 with a strip, ensuring that the epoxy board 9 is parallel to the ground. This serves as the part for fixing the onboard permanent magnet array 8. A four-module linear Halbach permanent magnet array is selected as the onboard permanent magnet array 8 and fixed to the epoxy board 9 at the bottom of the model car 10. The onboard permanent magnet array 8 is installed near the wheels, and a total of four onboard permanent magnet arrays 8 are installed.

[0037] like Figure 5As shown, the vehicle-mounted permanent magnet array 8 is formed by fixing five neodymium iron boron permanent magnets 11 with different magnetization directions to a low-carbon steel plate 12, forming a four-module linear Halbach permanent magnet array. Epoxy resin is coated on the upper surface of the low-carbon steel plate 12 of the vehicle-mounted permanent magnet array 8, and it is fixed to the lower surface of the epoxy plate 9 near the wheel. A total of four sets of vehicle-mounted permanent magnet arrays 8 are fixed, ensuring that the bottom of the vehicle-mounted permanent magnet array 8 is parallel to the ground and within the width range of the aluminum plate 7.

[0038] The maglev runway consists of an acceleration section 1 and a test section 2. The main body is made of ABS plastic. The acceleration section 1 and the test section 2 are connected. Both sides of the acceleration section 1 and the test section 2 are equipped with grooved wheel tracks 3. The width of the grooved wheel tracks 3 is consistent between the acceleration section 1 and the test section 2 to ensure a smooth connection. Figure 4 As shown. The wheels of the model car 10 are placed within the grooved wheel track 3. The width of the grooved wheel track 3 is slightly larger than the width of the tires of the model car 10, as shown. Figure 3 As shown. A groove is formed between the two grooved wheel track belts 3 in the test section 2 of the maglev runway, and a long strip of aluminum plate 7 is laid in the groove. The upper surface of the aluminum plate 7 is flush with the surface of the grooved wheel track belt 3.

[0039] In the acceleration section 1 of the maglev track, the model car 10 runs in the grooved wheel track 3, accelerating from zero to the required test speed. In the test section 2 of the maglev track, the model car 10 travels at a stable speed. The onboard permanent magnet array 8, fixed to the bottom of the model car 10, can move relative to the aluminum plate 7, generating magnetic levitation force and magnetic drag. Figure 2As shown, piezoelectric six-dimensional force sensors 4 are embedded under the two grooved wheel tracks 3 in both the acceleration section 1 and the test section 2 of the maglev track. The upper surface of the piezoelectric six-dimensional force sensor 4 is flush with the surface of the grooved wheel track 3, and is used to measure the vertical force and the force along the grooved wheel track 3 generated by the model car 10 during its movement. The piezoelectric six-dimensional force sensor 4 in the acceleration section 1 is embedded close to the test section 2 of the maglev track, which facilitates the acquisition of the instantaneous ground pressure and resistance of the model car 10 before it enters the test section 2. The piezoelectric six-dimensional force sensor 4 is connected to a photovoltaic power generation panel 13 through wires. The photovoltaic power generation panel 13 is installed on both sides of the maglev track, and the wires are embedded in the grooved wheel track 3, leading out from the side of the grooved wheel track 3 to the photovoltaic power generation panel 13. The photovoltaic power generation panel 13 converts light energy into electrical energy, providing the required power for the piezoelectric six-dimensional force sensor 4. The piezoelectric six-dimensional force sensor 4 is connected to the display 6 via a transmission cable 5. The transmission cable 5 is also embedded in the grooved wheel track 3 and leads out from the side of the grooved wheel track 3 to the display 6. The display 6 shows the corresponding magnetic levitation force and magnetic resistance collected by the piezoelectric six-dimensional force sensor 4.

[0040] The working method of the magnetic levitation road surface test device of this utility model:

[0041] During the test, the model car 10 is placed on the grooved wheel track 3 of the acceleration section 1 of the maglev track, and the model car 10 is accelerated from the beginning to the end of the acceleration section 1, so that the speed of the model car 10 is accelerated from zero to the speed required for the test. The piezoelectric six-dimensional force sensor 4 of the acceleration section 1 is placed near the end of the acceleration section 1. At this time, the speed of the model car 10 has been loaded to the required test speed. When the tire of the model car 10 passes the piezoelectric six-dimensional force sensor 4, the piezoelectric six-dimensional force sensor 4 can collect the instantaneous ground pressure and resistance of the model car 10 before entering the test section 2 of the maglev track, and at the same time transmit the signal to the display device 6 through the transmission cable 5. When the model car 10 enters the maglev test section 2, the relative motion between the onboard permanent magnet array 8 and the aluminum plate 7 of the maglev test section 2 causes the aluminum plate 7 to cut the magnetic field generated by the onboard permanent magnet array 8, inducing a current in the aluminum plate 7 and simultaneously generating magnetic levitation force and magnetic resistance on the onboard permanent magnet array 8. When the tires of the model car 10 pass the piezoelectric six-dimensional force sensor 4, the piezoelectric six-dimensional force sensor 4 can collect the instantaneous ground pressure and resistance on the model car 10, and simultaneously transmit the signal to the display 6 through the transmission cable 5.

[0042] The experimental device of this invention can realize the integration of linear Halbach permanent magnet array, automobile and road surface in the field of road traffic. It can simultaneously measure the magnetic levitation force and magnetic resistance generated in the test. At the same time, the photovoltaic power generation panel 13 supplies power to the piezoelectric six-dimensional force sensor 4, which can promote the application of this experimental device in real road scenarios.

[0043] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic levitation pavement test device characterized by comprising: It includes a model car (10) and a magnetic levitation runway; The bottom of the model car (10) is fixedly provided with a vehicle-mounted permanent magnet array (8), the magnetic levitation runway includes a magnetic levitation runway acceleration section (1) and a magnetic levitation runway test section (2), the magnetic levitation runway acceleration section (1) is connected with the magnetic levitation runway test section (2), recessed groove-shaped wheel track bands (3) are arranged on the two sides of the magnetic levitation runway acceleration section (1) and the magnetic levitation runway test section (2), the wheels of the model car (10) are arranged in the recessed groove-shaped wheel track bands (3), a recess is arranged between the recessed groove-shaped wheel track bands (3) on the two sides of the magnetic levitation runway test section (2), an aluminum plate (7) is arranged in the recess, piezoelectric six-dimensional force sensors (4) are arranged in the recessed groove-shaped wheel track bands (3) of the magnetic levitation runway acceleration section (1) and the magnetic levitation runway test section (2), the piezoelectric six-dimensional force sensors (4) are connected with photovoltaic power generation plates (13), and the piezoelectric six-dimensional force sensors (4) are connected with display instruments (6).

2. A magnetic levitation pavement testing device according to claim 1, characterized in that The bottom of the model car (10) is fixedly provided with an epoxy plate (9), the vehicle-mounted permanent magnet array (8) is fixed on the epoxy plate (9), and the vehicle-mounted permanent magnet array (8) is arranged at a position close to the tire.

3. The magnetic levitation pavement testing device according to claim 1, characterized in that, The vehicle-mounted permanent magnet array (8) includes a plurality of neodymium-iron-boron permanent magnets (11) with different magnetization directions, the plurality of neodymium-iron-boron permanent magnets (11) are fixed on a low-carbon steel plate (12), and the low-carbon steel plate (12) is fixed on the surface of the epoxy plate (9) through epoxy resin glue.

4. The magnetic levitation pavement testing device according to claim 1, characterized in that, The bottom of the vehicle-mounted permanent magnet array (8) is parallel to the ground, and the width of the vehicle-mounted permanent magnet array (8) is smaller than that of the aluminum plate (7).

5. The magnetic levitation pavement testing device according to claim 1, wherein The widths of the recessed groove-shaped wheel track bands (3) of the magnetic levitation runway acceleration section (1) and the magnetic levitation runway test section (2) are consistent, and the width of the recessed groove-shaped wheel track band (3) is greater than the width of the tire of the model car (10).

6. The magnetic levitation pavement testing device according to claim 1, wherein The main body parts of the magnetic levitation runway acceleration section (1) and the magnetic levitation runway test section (2) are made of ABS plastic.

7. The magnetic levitation pavement testing device according to claim 1, wherein The piezoelectric six-dimensional force sensors (4) are connected with the display instruments (6) through transmission cables (5), and the transmission cables (5) are led out from the side of the recessed groove-shaped wheel track band (3).

8. The magnetic levitation pavement testing device according to claim 1, characterized in that, The piezoelectric six-dimensional force sensors (4) in the magnetic levitation runway acceleration section (1) are arranged close to the magnetic levitation runway test section (2).

9. The magnetic levitation pavement testing device according to claim 1, characterized in that, The aluminum plate (7) is in a strip shape, and the upper surface of the aluminum plate (7) is flush with the surface of the recessed groove-shaped wheel track band (3).

10. The magnetic levitation pavement testing device according to claim 1, characterized in that, The piezoelectric six-dimensional force sensors (4) are connected with the photovoltaic power generation plates (13) through wires, the wires are led out from the side of the recessed groove-shaped wheel track band (3), and the photovoltaic power generation plates (13) are arranged on the two sides of the magnetic levitation runway.

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